/**
 * Copyright (c) 2011-2012 Optimax Software Ltd.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  * Neither the name of Optimax Software, ElasticInbox, nor the names
 *    of its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.elasticinbox.lmtp.delivery;

import java.util.HashMap;
import java.util.Map;

import org.apache.james.protocols.smtp.MailEnvelope;
import org.apache.james.protocols.smtp.MailAddress;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.elasticinbox.lmtp.server.api.DeliveryReturnCode;

/**
 * Delivery backend implementation
 * 
 * @author Rustam Aliyev
 */
public class MulticastDeliveryAgent implements IDeliveryAgent
{
	private static final Logger logger = LoggerFactory
			.getLogger(MulticastDeliveryAgent.class);
	private IDeliveryAgent[] agents;

	public MulticastDeliveryAgent(IDeliveryAgent... agents) {
		this.agents = agents;
	}

	@Override
	public Map<MailAddress, DeliveryReturnCode> deliver(MailEnvelope env, final String sessionId)
	{
		Map<MailAddress, DeliveryReturnCode> map = new HashMap<MailAddress, DeliveryReturnCode>();

		for (IDeliveryAgent agent : agents) {
			try {
				map.putAll(agent.deliver(env, sessionId));
			} catch (Exception e) {
				logger.warn(agent.getClass().getName()
						+ " delivery deferred: mail delivery failed: ", e);
				for (MailAddress address : env.getRecipients()) {
					map.put(address, DeliveryReturnCode.TEMPORARY_FAILURE);
				}
			}
		}
		return map;
	}

}
